ACH helps to improves payment processing efficiency and accuracy, and reduce expenses. This routing number is used for electronic financial transactions in the United States. Routing numbers may differ depending on where your account was opened and the type of transaction made.Įach routing number is unique to a particular bank, large banks may have more than one routing number for different states.ĪCH Routing Number: ACH Routing Number stands for Automated Clearing House (ACH). This number identifies the financial institution upon which a payment is drawn. The ABA routing number is a 9-digit identification number assigned to financial institutions by The American Bankers Association (ABA). ABA Routing Number: Routing numbers are also referred to as 'Check Routing Numbers', 'ABA Numbers', or 'Routing Transit Numbers' (RTN).